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CN-122015343-A - Refrigerating oil filling device and method for air conditioner refrigerating system

CN122015343ACN 122015343 ACN122015343 ACN 122015343ACN-122015343-A

Abstract

The disclosure relates to a refrigerating oil filling device and a filling method for an air conditioner refrigerating system, and belongs to the technical field of refrigerating system maintenance. The refrigerating system refrigerating oil filling device of the air conditioner comprises an oil storage device, a three-way valve, a pressure gauge, a vacuum pump and a refrigerant filling device. The oil reservoir is provided with a gas port, an oil inlet and an oil outlet, the gas port and the oil inlet are both positioned at the top of the oil reservoir, and the oil outlet is positioned at the bottom of the oil reservoir. The first end of the three-way valve is communicated with the gas port. The manometer is installed in the second end of three-way valve, and the manometer is used for monitoring the atmospheric pressure in the oil reservoir. The vacuum pump and the refrigerant charge are respectively in communication with the third ends of the three-way valves. The refrigerating oil filling device and the filling method for the air conditioner refrigerating system can be beneficial to avoiding refrigerant leakage and air entering the air conditioner refrigerating system, and simultaneously are beneficial to improving the filling speed of the refrigerating oil of the air conditioner refrigerating system.

Inventors

  • LI YONGLIANG
  • WU XIAOSHAN
  • ZHANG JINGTAO
  • YE CHENGGUI
  • HOU FEI
  • WANG SHIJIE
  • ZHONG HUADONG
  • Mei Baiyun
  • LI QUAN
  • CHENG TINGTING

Assignees

  • 奇瑞汽车股份有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The refrigerating system refrigerating oil filling device of the air conditioner is characterized by comprising an oil storage device (1), a three-way valve (2), a pressure gauge (3), a vacuum pump (4) and a refrigerant filling device (5); The oil storage device (1) is provided with a gas through hole (11), an oil inlet (12) and an oil outlet (13), the gas through hole (11) and the oil inlet (12) are both positioned at the top of the oil storage device (1), and the oil outlet (13) is positioned at the bottom of the oil storage device (1); the first end of the three-way valve (2) is communicated with the gas port (11); The pressure gauge (3) is arranged at the second end of the three-way valve (2), and the pressure gauge (3) is used for monitoring the air pressure in the oil reservoir (1); The vacuum pump (4) and the refrigerant filler (5) are respectively communicated with the third end of the three-way valve (2), wherein when the vacuum pump (4) is communicated with the third end of the three-way valve (2), the vacuum pump (4) is used for pumping out air in the oil reservoir (1), and when the refrigerant filler (5) is communicated with the third end of the three-way valve (2), the refrigerant filler (5) is used for filling refrigerant gas into the oil reservoir (1).
  2. 2. An air conditioning and refrigerating system refrigerant oil filling device according to claim 1, characterized in that the refrigerant filler (5) is a refrigerant bottle or a high pressure discharge end of a compressor (61) of an air conditioning and refrigerating system (6).
  3. 3. The refrigeration system refrigeration oil filling device according to claim 1, wherein the oil inlet (12) is provided with an oil inlet valve (121), and the oil inlet valve (121) is used for controlling a communication state of the oil inlet (12).
  4. 4. Refrigerated oil filling device of an air conditioning and refrigeration system according to claim 1, characterized in that said oil outlet (13) is provided with an oil outlet valve (131), said oil outlet valve (131) being adapted to control the communication state of said oil outlet (13).
  5. 5. A method for filling refrigerating oil of an air-conditioning refrigeration system, characterized in that the filling method uses the refrigerating oil filling device of an air-conditioning refrigeration system according to any one of claims 1 to 4.
  6. 6. The filling method according to claim 5, characterized in that it comprises the steps of: Opening an oil inlet (12) of an oil reservoir (1) of the refrigerating oil filling device of the air-conditioning refrigerating system, and filling refrigerating oil into the oil reservoir (1) through the oil inlet (12); Closing the oil inlet (12), and connecting a vacuum pump (4) of the refrigerating oil filling device of the air-conditioning refrigerating system with a third end of a three-way valve (2) of the refrigerating oil filling device of the air-conditioning refrigerating system; Opening the three-way valve (2), and starting the vacuum pump (4) to pump out air in the oil reservoir (1) until a pressure gauge (3) of the refrigerating oil filling device of the air-conditioning refrigerating system shows negative pressure; Closing the three-way valve (2), separating the vacuum pump (4) from the third end of the three-way valve (2), and connecting a refrigerant filler (5) of a refrigerating oil filling device of an air-conditioning refrigerating system with the third end of the three-way valve (2); Opening the three-way valve (2) and filling refrigerant gas into the oil reservoir (1); An oil outlet (13) of the oil reservoir (1) is connected with a refrigerating oil filler of an air conditioner refrigerating system (6); opening the oil outlet (13) and filling the refrigerating system (6) with refrigerating oil; After the filling of the frozen oil is completed, the oil outlet (13) is closed.
  7. 7. -The filling method according to claim 6, characterized in that said air-conditioning refrigeration system (6) is in a stopped state when said refrigerant filler (5) is a refrigerant bottle; After refrigerant gas is filled into the oil reservoir (1) until the pressure in the oil reservoir (1) reaches a specified pressure, and the oil outlet (13) is connected with a refrigerating oil filling port of an air-conditioning refrigerating system (6), the three-way valve (2) is closed firstly, and then the oil outlet (13) is opened; Preferably, when the pressure in the oil reservoir (1) reaches a specified pressure, the indication of the pressure gauge (3) is located between 5kgf/cm2 and 8kgf/cm 2.
  8. 8. The filling method according to claim 7, characterized in that, when the oil inlet (12) is closed, the frozen oil in the oil reservoir (1) occupies 3/5~4/5 of the maximum volume of the oil reservoir (1); Preferably, when the oil inlet (12) is closed, the frozen oil in the oil reservoir (1) occupies 2/3 of the maximum volume of the oil reservoir (1).
  9. 9. A filling method according to claim 6, characterized in that when the refrigerant charger (5) is the high-pressure discharge end of the compressor (61) of the air-conditioning and refrigerating system (6), the air-conditioning and refrigerating system (6) is in an operating state, and the refrigerant oil filler of the air-conditioning and refrigerating system (6) is the low-pressure suction end (611) of the compressor (61).
  10. 10. Filling method according to claim 9, characterized in that, when closing the oil inlet (12), the frozen oil in the oil reservoir (1) occupies 95-100% of the maximum volume of the oil reservoir (1); preferably, when the oil inlet (12) is closed, the frozen oil in the oil reservoir (1) occupies 100% of the maximum volume of the oil reservoir (1).

Description

Refrigerating oil filling device and method for air conditioner refrigerating system Technical Field The disclosure relates to the technical field of refrigeration system maintenance, in particular to a refrigeration oil filling device and a filling method for an air conditioner refrigeration system. Background The compressor as a core component of an air conditioning refrigeration system needs to be lubricated by refrigeration oil to ensure reliable operation of moving parts within the compressor. After the air conditioner refrigerating system runs for a long time, the refrigerating oil in the compressor and the pipeline of the air conditioner refrigerating system is gradually reduced, so that the lubrication effect of the compressor is affected. Therefore, during operation and maintenance of the air conditioning refrigeration system, the chilled oil needs to be periodically checked and replenished. In the related art, because the air-conditioning refrigerating system is a closed system, the filling of the refrigerating oil often has a plurality of inconveniences, namely, in a system stop state, the pressure difference exists between a crankcase of a compressor and the outside, the refrigerant leakage or the air entering the system is easily caused by directly adding the refrigerating oil, and in addition, more complicated operation skills are required in the system operation, and the speed is lower. Disclosure of Invention In view of this, the embodiments of the present disclosure provide a device and a method for filling refrigeration oil in an air-conditioning refrigeration system, which can be beneficial to avoiding leakage of refrigerant and entry of air into the air-conditioning refrigeration system, and simultaneously, is beneficial to improving the filling speed of refrigeration oil in the air-conditioning refrigeration system. The technical scheme is as follows: in a first aspect, an air-conditioning refrigeration system refrigeration oil filling device is provided, and the air-conditioning refrigeration system refrigeration oil filling device comprises an oil reservoir, a three-way valve, a pressure gauge, a vacuum pump and a refrigerant filler; the oil storage device is provided with a gas port, an oil inlet and an oil outlet, wherein the gas port and the oil inlet are both positioned at the top of the oil storage device, and the oil outlet is positioned at the bottom of the oil storage device; the first end of the three-way valve is communicated with the gas port; the pressure gauge is arranged at the second end of the three-way valve and is used for monitoring the air pressure in the oil reservoir; The vacuum pump and the refrigerant filler are respectively communicated with the third end of the three-way valve, wherein the vacuum pump is used for pumping air in the oil reservoir when the vacuum pump is communicated with the third end of the three-way valve, and the refrigerant filler is used for filling refrigerant gas into the oil reservoir when the refrigerant filler is communicated with the third end of the three-way valve. In some possible embodiments, the refrigerant charger is a refrigerant bottle or a high pressure discharge end of a compressor of an air conditioning refrigeration system. In some possible embodiments, the oil inlet is provided with an oil inlet valve, and the oil inlet valve is used for controlling the communication state of the oil inlet. In some possible embodiments, the oil outlet is provided with an oil outlet valve for controlling the communication state of the oil outlet. In a second aspect, a method for filling refrigerating oil of an air-conditioning refrigeration system is provided, where the method uses the refrigerating oil filling device of the air-conditioning refrigeration system in any one of the first aspects. In some possible embodiments, the filling method comprises the steps of: opening an oil inlet of an oil reservoir of a refrigerating oil filling device of the air-conditioning refrigeration system, and filling refrigerating oil into the oil reservoir through the oil inlet; Closing the oil inlet, and connecting a vacuum pump of a refrigerating oil filling device of the air-conditioning refrigerating system with a third end of a three-way valve of the refrigerating oil filling device of the air-conditioning refrigerating system; opening the three-way valve, and starting the vacuum pump to pump out air in the oil reservoir until a pressure gauge of the refrigerating oil filling device of the air-conditioning refrigerating system shows negative pressure; closing the three-way valve, separating the vacuum pump from the third end of the three-way valve, and connecting a refrigerant filler of a refrigerating oil filling device of an air-conditioning refrigerating system with the third end of the three-way valve; Opening the three-way valve, and filling refrigerant gas into the oil reservoir; connecting an oil outlet of the oil reservoir with a refrigerat